The Lost World Short Essay - Answer Key

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1. When the theory of evolution was first presented, there was very little debate. Why?

When the theory of evolution was first presented, there was very little debate because scientists simply saw extinction as the failure of a species to adapt.

2. What happens in the 1970s that leads scientists to wonder if human behavior could ultimately lead to extinction?

In the 1970s, scientists began to wonder if human behavior could ultimately lead to extinction because mankind's technology was progressing at an alarming rate

3. Identify and describe the theory supported by the high levels of iridium at the K-T boundary.

When Alvarez discovered high levels of iridium at the K-T boundary, this find supported the theory that dinosaurs became extinct due to a calamitous meteor strike. According to this theory, the meteor strike resulted in enough dust and debris to darken the skies, inhibit photosynthesis, kill plants and animals, and wipe out the dinosaurs.

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